Mini heat sealing machine can keep your food fresh longer when you open the food.It use the heat to seal the plastic bag.Heat Sealer will easily reseal original plastic bags so food will stop being exposed to dust and bacteria.Place for edge of poly or Mylar bag in your sealer and slowly pull the bag through. Squeeze air out of bag before completing the seal to create vacuum effect. It easily attaches to refrigerators or any stationary metal surface so you will keep it handy in your kitchen, outdoor, cabinet or anywhere you need it.